Athlon XP 2100+ vs Atom E660

Athlon XP 2100+ vs Atom E660 Performance Spectrum

Athlon XP 2100+

1 / 1

265

0.0%

Athlon XP 1600+

Athlon XP 1800+

Ryzen 7 4700GE

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Ryzen Threadripper 7970X

Ryzen Threadripper PRO 7985WX

Atom E660

1 / 2

275

+3.8%

About PassMark

PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

Athlon XP 2100+ vs Atom E660 FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Athlon XP 2100+ vs Atom E660: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Athlon XP 2100+

2001

Why buy it

Trade-offs

❌Lower PassMark (265 vs 275).
❌Launch MSRP is still $420 MSRP, while Atom E660 mostly shows up through inconsistent older-market listings.
❌2300% higher power demand at 72W vs 3W.
❌No integrated graphics, while Atom E660 can still boot and troubleshoot without a discrete GPU.

Atom E660

2010

Why buy it

✅+3.8% higher PassMark.
✅Draws 3W instead of 72W, a 69W reduction.
✅100+% more PCIe lanes (4 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel GMA 600, while Athlon XP 2100+ needs a discrete GPU.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Atom E660 better than Athlon XP 2100+?

It depends on what you want from the system. For gaming, Athlon XP 2100+ is ahead with 33.1% higher max boost clock. For rendering, compiling, streaming, and heavier multitasking, Atom E660 pulls ahead with 3.8% better PassMark.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Atom E660 is the stronger fit. You are getting 3.8% better PassMark, backed by 1 cores and 2 threads.

Which one is the smarter buy today, not just the cheaper CPU?

Atom E660 is still the much better call for a fresh build. Atom E660 comes in at an unclear MSRP at unclear MSRP versus $420 MSRP, and it still gives you 3.8% better PassMark. Athlon XP 2100+ only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2001 platform. Even with 100.0% better value on paper (0.6 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on A.

Which one is more future-proof for 2026 and beyond?

Atom E660 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2010 vs 2001) and more multi-core headroom with 1 cores / 2 threads instead of 1/1. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Athlon XP 2100+ vs Atom E660 Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Athlon XP 2100+

The Athlon XP 2100+ is manufactured by AMD. It was released in 2009-01-01. It is based on the Thoroughbred (2001−2002) architecture. It features 1 cores and 1 threads. Max frequency: 1.73 GHz. L3 cache: 0 kB. L2 cache: 256 kB. Built on 180 nm process technology. Socket: A. Thermal design power (TDP): 72 Watt. Passmark benchmark score: 265 points. Launch price was $149.

Atom E660

The Atom E660 is manufactured by Intel. It was released in 14 September 2010 (15 years ago). It is based on the Tunnel Creek (2010) architecture. It features 1 cores and 2 threads. Max frequency: 1.3 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: BGA676. Thermal design power (TDP): 3 Watt. Memory support: DDR2. Passmark benchmark score: 275 points. Launch price was $54.

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Processing Power

The Athlon XP 2100+ packs 1 cores / 1 threads, matching the Atom E660's 1 cores. Boost clocks reach 1.73 GHz on the Athlon XP 2100+ versus 1.3 GHz on the Atom E660 — a 28.4% clock advantage for the Athlon XP 2100+. The Athlon XP 2100+ uses the Thoroughbred (2001−2002) architecture (180 nm), while the Atom E660 uses Tunnel Creek (2010) (45 nm). In PassMark, the Athlon XP 2100+ scores 265 against the Atom E660's 275 — a 3.7% lead for the Atom E660. Both processors carry 0 kB of L3 cache.

Feature	Athlon XP 2100+	Atom E660
Cores / Threads	1 / 1	1 / 2
Boost Clock	1.73 GHz+33%	1.3 GHz
L3 Cache	0 kB	0 kB
L2 Cache	256 kB	512 kB (per core)+100%
Process	180 nm	45 nm-75%
Architecture	Thoroughbred (2001−2002)	Tunnel Creek (2010)
PassMark	265	275+4%

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Memory & Platform

The Athlon XP 2100+ uses the A socket (PCIe 1.1), while the Atom E660 uses BGA676 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR-266 on the Athlon XP 2100+ versus DDR2-800 on the Atom E660 — the Atom E660 supports -400.8% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Athlon XP 2100+ supports up to 4 GB of RAM compared to 2 GB — 100% more capacity for professional workloads. Both feature 1-channel memory with ECC support. PCIe lanes: 0 (Athlon XP 2100+) vs 4 (Atom E660) — the Atom E660 offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD Socket A (Athlon XP 2100+) and Intel FCBGA518 (Atom E660).